I just purchased an '04 the other day. The car initially appeared to be in top shape but now a couple gremlins have shown up.
Namely the cooling system. I topped off the resevoir by the radiator to the "F" mark. Two days later that bottle is now below "L". I looked on some other threads and someone mentioned a resevoir that is above the turbo. I looked in my engine compartment and there is nothing over my turbo. There is an open space on the passenger side next to the intercooler. I can see a metal bracket with a threaded insert hanging off the intercooler that isn't being used and there is a small plastic hose support/bracket on top of the engine near the oil vent lines that is unused.
Do you think the previous owner removed this for some mod? Is this common? Any ideas where all my coolant is going? Do you think he bypassed this bottle and there's something leaking?
The car doesn't run hot and I don't recall any leaks but I'll keep an eye on it now.
Any help would be greatly appreciated. I really love the car but I'm newby here and could really use some help.